Spring-hinge.



No. 747,680; I PATEN-TED DEC. 22, 1903.

' E. BOMMER.

SPRING HINGE:

APPLICATION FILED FEB. 24', mos.

NOMODELj Y I l l w Patented. December 22, 1903.

' PAT NT OFFICE.

EMIL BOMMER, OF NEW YORK, N. Y.

SPRING-HINGE.

'srncirlonrrolvrormmg part of Letters Patent Nb. 747,680, dated December2, 1903.

I Application filed February 24:, 1903. Serial No. 144,671. (No model.)

To wZZ whom it may concern:

Be it known that I, EMIL BOMMER, a citizen of the United States,residing in New York, in the borough of Brooklyn and State of New York,have invented certain new and useful Improvementsin Spring-Hinges, ofwhich the following is a specification This invention relates toimprovements in single and double acting spring-hinges, and moreespecially to spring-hinges in which the spring-holders are providedwith ball-bearing washers, so that the friction of the 'parts is reducedand the movement'of the flanges facilitated; and the invention consistsof a spring-hinge in which the adjustable springholder, which usuallyhas radial holes for adj usting the tension of the springs, is providedwith washers between it and the adjacent end of the barrel, while thefixed spring-holder,

which is connected to the opposite end of thebarrel, has ball-bearingwashers between it and the adjacent pintle-socket, both of said 1ball-bearing washers being inclosed by dustcaps of angularcross-section, so as to protect the ball-bearings against dust andmoisture. In the accompanying drawings, Figure 1 represents a sideelevation of a double-acting springhinge provided with my improvedball-bearing washers and dust-caps. Fig. 2 is a vertical central sectionthrough onebarrel of the spring-hinge. Figs. 3 and .6 are details of thedust-caps. Figs. 4 and 5 are details of the upper ball-bearing washer.Fig. 7 is a detail of the lower ball-bearing washer; Fig. 8 is ahorizontal section on line 8 8 of Fig. 2; and Fig. 9 is averticalsection of Fig. 8 on line 9 9, but on a larger scale.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, a represents'the barrel of a single or doubleacting springhinge in which the springs are placed, 1) the pintle, d dthe pintle-sockets, and e e the spring-holder, of my improvedspring-hinge. Between the adjustable spring-holder e, which is providedwith the usual radial holes for adjusting the tension of the spring, andthe adjacent end of the barrel is interposed a ballbearing washerconsisting of two circular ball-races ff, which are shown in detail inFigs. 4 and 5. Each ball-race is provided with a circular groove,between which the antifriction-balls g are interposed when the parts areplaced in position. Acirculardustcap 72. of angular cross-section isinterposed between the adjustable spring-holder e and the upperball-race f, the horizontal portion of the angulardust-cap being firmlyheld in position between the spring-holder eand upper ball-race f, Whilethe vertical portion of the angular dustcap, encircles the ringshapedball-races, so as to prevent the ingress of dust, moisture, &c., to theballs and hearing. The lower ring-shaped ball-race f isprovided withashoulder f that fits in the barrel a, while the ring-shaped ball-raceitself rests on the adjacent edge of the barrel. The

ball-race f is also provided at one part of its circumference with alugf that fits into a recess a of the barrel, as shown clearly in Figs.2, 8, and 9, the interlocking of the lug f in the recess a preventingtheaxial turning of the lower ball-race f on the upper part of thespring-barrel. The two spring-barrels are usually joined by flangesforming a web 0. which are integral with the spring-barrels proper, inwhich web a small space is formed in the making of the same. This spaceacts as a recess for the lugs f of the lower ballrace f and is clearlyshown in Fig. 8. At the opposite or lower end of the spring-barrel,between the spring-holder e, which is held tightly to the spring-barrelwhy a screw or pin, and the lower pintle-socket of the springhinge isinterposed a ball-bearing washer consisting of a ball-race 't', which isprovided'with a circular groove for the antifriction-balls d, which reston the upper plane surface of the adjacent pintle-socket, as shownclearly in Fig.2, so as tofollow the motion of the flange attachedtothe-barrel or of the web (1. connecting the two spring-barrels, asshown in Fig. l. The ball-race 'i is providedwi'th a circumferentialshoulder 2' of smaller circumference than the barrel andfitting in thesame. Between the ball-race t proper and provided with a lug 11 whichfits in a recess the adjacent edges of the barrel is interposed of thespring-barrel and holds the ball-race to the same, and the dust-cap g isprovided in its horizontal flange g with a recess g which is engaged bythe lug 2' of the ball-race, so that the ball-race 2' and the dust-cap gmove with the barrel. Thus, it is seen, the upper ball-bearing washertakes up the friction between the barrel and the adjustable springholderas the same is moved under the influence of the flange, while the lowerballbearing washer takes up the friction between the barrel, with itsfixed spring-holder e, and the lower pintle-socket at when the barrel ismoved under the influence of the second flange or web a By the insertionof the washer at the opposite ends of the barreland by providing adust-cap for each ball-bearing the friction between the parts of thespring-hinge is greatly red need, an easier motion of the spring-hingethereby obtained, and the d net and moisture kept from entering thebearings, increasing thereby the life and utility of the same.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. In a spring-hinge, the combination, with thespring-barrel and spring-holder, of a ballbearing washer interposedbetween said spring-holder and the adjacent edge of the barrel andprovided with means for engaging a recess in the innercircuinference ofthe adjacent edge of the spring-barrehsubstantially as set forth.

2. In a spring'hinge, the combination, with the spring-barrel andspring-holder, of a ballbearing washer interposed between saidspring-holder and the adjacent edge of the barrel, having a lug engaginga recess in the inner circumference of the adjacent edge of thespring-barrel, substantially as set forth.

3. In a spring-hinge, the combination, with the spring-barrel andspring-holder, of a ballbearing washer interposed between saidspring-holder and the adjacent edge of the barrel and provided withmeans for engaging a recess in the inner circumference of the adjacentedge of the spring-barrel, and a dustcap extending over and inclosingsaid ballbearing, substantially as set forth.

4:. In a spring-hinge, the combination, with the spring-barrel and thespring-holder, of a ball-bearing washer interposed between saidspring-holder and the adjacent edge of the barrel, said washerconsisting of two circular ball-races,antifriction-balls between thesame and provided with means for engaging a recess in the innercircumference of the adjacent edge of the spring-barrel, substantiallyas set forth.

5. In a spring-hinge, the combination, with the spring-barrel,the fixedspring-holder, and the adjacent pintle'socket, of a ball-bearing washerinterposed between the fixed springholder,adjacent edge of thespriug'barrel and the pintle-socket, a shoulder on said washer fittingin the spring-barrel, and a dust-cap interposed between said washer andthe adjacent edge of the spring-barrel, said dustcap extending aroundsaid washer, substantially as set forth.

6. In aspring-hinge, the combination, with the spring-barrel,fixedspring-holder, and adjacent pintle-socket, of a ball-bearing washerinterposed between the fixed spring-holder, adjacent edge of thespring-barrel and the piutle-socket, a shoulder on said washer fittingin the spring-barrel, a lug on said washer engaging a recess in theinner circumference of the adjacent edge of the spring-barrel, and adust-cap interposed between said washer and the adjacent edge of thespringbarrel, said dust-cap extending around the ball-bearing washer,and provided with a recess for engaging the lug on the washer,substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

EMIL BOMMER.

Witnesses:

O. P. GoEPEL, HENRY J. SUHRBIER.

